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Commit 2c003e8e authored Dec 10, 2006 by Jean Delvare Committed by Jean Delvare Dec 10, 2006

i2c: Use put_user instead of copy_to_user where possible



This speeds up the I2C_FUNCS ioctl by 5 to 8% in my tests.

Signed-off-by: Jean Delvare <khali@linux-fr.org>
Laughed-at-by: Mark M. Hoffman <mhoffman@lightlink.com>

parent 813e30e9

drivers/i2c/i2c-dev.c

+1 −2

Original line number	Diff line number	Diff line
		@@ -193,8 +193,7 @@ static int i2cdev_ioctl(struct inode inode, struct file file,
		return 0;
		case I2C_FUNCS:
		funcs = i2c_get_functionality(client->adapter);
		return (copy_to_user((unsigned long __user *)arg, &funcs,
		sizeof(unsigned long)))?-EFAULT:0;
		return put_user(funcs, (unsigned long __user *)arg);

		case I2C_RDWR:
		if (copy_from_user(&rdwr_arg,